We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Uniaxial 3D Measurement with Auto-Synchronous Phase-Shifting and Defocusing Based on a Tilted Grating.
- Authors
Ren, Hui; Liu, Yuankun; Wang, Yajun; Liu, Ningyi; Yu, Xin; Su, Xianyu
- Abstract
Conventional uniaxial techniques generally require shifting objects or projection grating with the assistance of a high-precision mechanical moving component. To overcome this limitation, we propose a novel uniaxial 3-D shape measurement system with auto-synchronous phase-shifting and defocusing by using a tilted and fixed projection grating. The tilted focused image plane (FIP), which is reflected by a mirror at about 90 degrees, could be shifted across the measured surface by slightly rotating the mirror within a small angle range. This procedure will simultaneously introduce the change in defocusing and phase-shifting of the fringe. The modulation curve of each point can be deciphered by Fourier fringe analysis after a sequence of fringe intensities is acquired. Since both the measured object and projection grating are fixed, the proposed method could make the measurement system more compact and flexible. Both computer simulation and experiments are carried out to demonstrate the validity of this proposed system.
- Subjects
SHAPE measurement; FOURIER analysis; COMPUTER simulation; SEQUENCE analysis; MEASUREMENT; GRAY codes
- Publication
Sensors (14248220), 2021, Vol 21, Issue 11, p3730
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s21113730